Yes, we used to build our coupons like that until DSCC slapped our hands for the reasons mentioned. The IPC-2221 Coupon sub-committee is looking into the feasibility of creating this coupon in this fashion now. Chris, are you out there? Tom Jose A Rios <[log in to unmask]> Sent by: IPC-600-6012 <[log in to unmask]> 05/14/2010 03:24 PM Please respond to "(Combined Forum of D-33a and 7-31a Subcommittees)" <[log in to unmask]> To [log in to unmask] cc Subject [IPC-600-6012] E coupon configuration We noted that our coupon generator flips the direction of the Y circuit pattern on the 10th layer to control the length of the E coupon, as shown in the 1st screenshot below. Arguably it may compromise the integrity of the test between layers 10 and 11, since there is basically no overlapping circuits. Does a re-design like the one the 2nd screenshot below violate any coupon design reqts?? The 10th plane use wires in both directions so that it is effective in testing both against the 9th and 11th planes like this. (Blue is the 10th plane, Yellow is the 11th plane, purple-ish is where there is data on both planes) Has anyone else run into this situation?? Joey Rios PWB & Process Quality Eng'r Endicott Interconnect Technologies 1093 Clark St. Endicott, NY 13760 Office: 607-755-5896 ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________ ______________________________________________________________________ This email has been scanned by the MessageLabs Email Security System. For more information please contact helpdesk at x2960 or [log in to unmask] ______________________________________________________________________